Answer: Choom.

A new book on Barack Obama reveals fresh details about the president’s youthful days as an avid smoker of marijuana — a time when he and his fellow weed smokers called themselves the “Choom Gang.”

Among the highlights:

— Obama was known for his interceptions. This is the act of joining a circle of people passing around a joint, taking a hit and yelling, “Intercepted!”

— Obama and his friends at the Punahou School in Hawaii called themselves the “Choom Gang” — choom means smoking weed — and drove around in a Volkswagen bus called the “Choomwagon.”

— Obama and his crew enjoyed what they called “roof hits,” smoking pot inside a car with all the windows rolled up to maximize the amount of smoke they inhaled.

Why did Obama put his dog on the roof of the car? So it wouldn’t get stoned.

Speaking only for myself, I’m fine with having a president who used to get blazed out of his mind. It’s just funny that the same people who are scrambling to defend him were, shall we say, somewhat less accepting of Bush’s youthful indiscretions.